Hi. I'm currently trying to put together the specification for a new video editing PC which would include a Matrox RT.X10 capture card and also a Matrox Parhelia video card. I've already got these two items but am not sure if there are compatibility or other issues with the rest of my spec.
My intended spec. is as follows.

CASE: COOLERMASTER SILEO 500 QUIET MID TOWER CASE
Processor: Intel Core i5-750 Quad Core (2.66GHz, 8MB Cache)
M'board: ASUS® P7H57D-V EVO: FULL ATX, TRUE USB 3.0 & SATA 6.0 GB/s
Graphics Card: ?? Do I need one if I have the Matrox Parhelia??
RAM: 4GB CORSAIR XMS3 DUAL-DDR3 1600MHz
System Disk: 150GB WD VELOCIRAPTOR® SATA 16MB CACHE (10,000rpm)
Sec. Disk: 300GB WD VELOCIRAPTOR® SATA 16MB CACHE (10,000rpm)
DVD Drive: 24x DUAL LAYER DVD WRITER ±R/±RW/RAM
Power Supply: 800W Quiet Quad Rail PSU + 120mm Case Fan
Soundcard: Sound Blaster® X-Fi™ Xtreme Audio
USB: 2 PORT USB 3.0 INTERNAL PCI EXPRESS CARD
Firewire: 3 Port IEEE 1394a Firewire PCI Card
Op. System: Windows XP™ Professional.

(Apologies for my ignorance in certain areas)

This is my first posting to this forum. I would be extremely grateful for any advice offered. Thanks in advance.

Manufan.